CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Statement of Comprehensive Income [Abstract]
Net income	$ 408	$ 293	$ 1,061	$ 719
Other comprehensive income (loss)
Pension and other postretirement benefit plan adjustments (net of tax expense of ($1), ($2), ($3), and ($5))	3	6	10	17
Currency translation adjustments	(38)	106	(36)	19
Net change in cash flow hedges (net of tax (expense) benefit of ($3), $6, ($6), and $0)	6	(15)	14	(1)
Other comprehensive income (loss)	(29)	97	(12)	35
Comprehensive income	379	390	1,049	754
Comprehensive income (loss) attributable to noncontrolling interests	1	(1)	(2)	(12)
Comprehensive income attributable to Rockwell Automation, Inc.	$ 378	$ 391	$ 1,051	$ 766